Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP24)
DOI: https://doi.org/10.29363/nanoge.iperop.2024.022
Publication date: 18th October 2023
Sn-based PSCs (14.6% PCE) are primary candidates to usurp their toxic Pb-based counterparts (26.1% PCE) [1,2].
However, they are currently limited by facile oxidation inhibiting stability, and lower PCEs due to energetic mis-
matches [3]. We have recently published a a study detailing the rapid, auto-catalytic oxidation of Sn(II) to Sn(IV) by
demonstrating the detrimental consequences of iodine generation in Sn PSCs [4]. These ideas are expanded upon in a
follow up discussion highlighting the important relationship between hole extraction and device stability, providing
motivation for in-depth studies of the HTL/perovskite interface [5].
This study builds upon the importance of fast hole extraction via the optimisation of energy levels at the
HTL/perovskite interface. We will discuss strategies to improve hole extraction through compositional tuning and
due consideration of HTL energetics. These strategies to remove free holes subsequently can be related to suppressed
Sn(II) oxidation. Preliminary results show substitution of Br– ions with I– ions widen the band gap and deepen the
valence band, allowing us to demonstrate the importance of good energetic alignment. We use this knowledge to
screen HTLs (both established and unreported) in the relatively unexplored N-I-P tin architecture. From this analysis, we
offer design criteria into the optimal HTL/perovskite interface for N-I-P architecture with regards to performance and
stability.
I would like to thank my supervisors Prof. S Haque and Prof. R Palgrave for their insightful feedback. Special thanks go to Thomas Webb for his constant support and reassurance, help with interpretation and being a great source of professional confidence. I would like to pay special appreciation to my family for their moral support, and my loving wife for her perpetual encouragement. And of course, Alhamdullilahi Rabbil Alameen.
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International Conference on Hybrid and Organic Photovoltaics
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Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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